package ru.usu.gv.utils;

/**
 * @author spupyrev
 * 12.01.2009
 */
public class Pair<T, S> implements Comparable<Pair<T, S>>
{
	private T first;
	private S second;

	public Pair()
	{
	}

	public Pair(T first, S second)
	{
		this.first = first;
		this.second = second;
	}

	public T getFirst()
	{
		return first;
	}

	public void setFirst(T first)
	{
		this.first = first;
	}

	public S getSecond()
	{
		return second;
	}

	public void setSecond(S second)
	{
		this.second = second;
	}

	@Override
	public int hashCode()
	{
		final int prime = 31;
		int result = 1;
		result = prime * result + ((first == null) ? 0 : first.hashCode());
		result = prime * result + ((second == null) ? 0 : second.hashCode());
		return result;
	}

	@Override
	public boolean equals(Object obj)
	{
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		Pair other = (Pair) obj;
		if (first == null)
		{
			if (other.first != null)
				return false;
		}
		else if (!first.equals(other.first))
			return false;
		if (second == null)
		{
			if (other.second != null)
				return false;
		}
		else if (!second.equals(other.second))
			return false;
		return true;
	}

	public int compareTo(Pair<T, S> other)
	{
		Comparable f1 = (Comparable) first;
		Comparable f2 = (Comparable) other.first;
		int res = f1.compareTo(f2);
		if (res != 0)
			return res;

		Comparable s1 = (Comparable) second;
		Comparable s2 = (Comparable) other.second;
		return s1.compareTo(s2);
	}

}
